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Math

Submission + - Hands on with TI's Color-Screen TI-84 Plus (cemetech.net)

KermMartian writes: "The TI-84 Plus C Silver Edition isn't the first color-screen graphing calculator, or even TI's first color calculator, but it's a refresh of a 17-year-old line that many have mocked as antiquated and overpriced. From an advanced review model, the math features look familiar, solid, and augmented with some new goodies, while programming looks about on par with its siblings. The requisite teardown uncovers the new battery, Flash, ASIC/CPU, and LCD used in the device. Although there are some qualms about its speed and very gentle hardware upgrades beyond the screen, it looks to be an indication that TI will continue this inveterate line for years to come."

Comment Calculators; Python (Score 2) 183

I've spoken to countless now-engineers and professional programmers who started learned programming by playing around with graphing calculators. They're ubiquitous, your audience is huge, and the built-in TI-BASIC language is surprisingly powerful. I'd definitely recommend he pursue that as a means to learn to think like a programmer, skills like structuring programs, prototyping with pseudocode, debugging, and all that. In fact, I wrote a book teaching those very skills. Alternatively, Python is a great beginner computer language in that the syntax is clear and cruft-free (yes, Java, I'm looking at public static void main()...) and crashes are generally graceful and easy-to-debug.
Science

Submission + - Quantum gas goes below absolute zero (nature.com)

mromanuk writes: It may sound less likely than hell freezing over, but physicists have created an atomic gas with a sub-absolute-zero temperature for the first time. Their technique opens the door to generating negative-Kelvin materials and new quantum devices, and it could even help to solve a cosmological mystery.

Submission + - In Calculator Arms Race, Casio Fires Back: Color Touchscreen ClassPad (cemetech.net) 2

KermMartian writes: "In what seems to be an accelerating arms race for graphing calculator supremacy between Texas Instruments and Casio, the underdog Casio has fired a return salvo to the recently-announced TI-84 Plus C Silver Edition. The new ClassPad fx-CP400 has a massive color touchscreen and a Matlab-esque CAS. Though not accepted on the SAT/ACT, will such a powerful device gain a strong following among engineers and professionals?"
Government

Submission + - Syria off the Internet Grid (paritynews.com)

hypnosec writes: Amidst the ongoing civil war, Syria has gone off the Internet a few hours ago with all the 84 IP block within the country unreachable from the outside. Renesys, a research firm, keeping tabs on the health of the Internet reported at about 5:25 ET that Syria’s Internet connectivity has been shut. The internet traffic from outside to Syrian IP addresses is going undelivered and anything coming out from within the country is not reaching the Internet. Akamai has tweeted that its traffic data supports what Renesys has observed.

Comment More details (Score 2) 245

Since i posted this article, we discovered many things: - The TI-84+CSE will have a z80 processor, same as the TI-82, TI-83, and TI-83+/84+ - It will have an Nspire-esque rechargeable battery - It will have a TI-84+/SE-compatible OS, so the same math books and lessons will work with it.

Submission + - Color-Screen TI-84 Plus Calculator Leaked (cemetech.net) 1

KermMartian writes: "It has been nearly two decades since Texas Instruments released the TI-82 graphing calculator, and as the TI-83, TI-83+, and TI-84+ were created in the intervening years, these 6MHz machines have only become more absurdly retro, complete with 96x64-pixel monochome LCDs and a $120 price tag. However, a student member of a popular graphing calculator hacking site has leaked pictures and details about a new color-screen TI-84+ calculator, verified to be coming soon from Texas Instruments. With the lukewarm reception to TI's Nspire line, it seems to be an attempt to compete with Casio's popular color-screen Prizm calculator. Imagine the graphs (and games!) on this new 320x240 canvas."

Comment Re:Kids interested in PROGRAMMING! (Score 1) 302

Absolutely agreed. I just wrote a book on learning to program using graphing calculators as a springboard, entitled "Programming the TI-83 Plus/TI-84 Plus", which ironically ships from the bindery to stores today! I heartily recommend getting kids excited about programming with graphing calculators, and in thirteen years of volunteering my time to the community I've seen hundreds of users become calculator programmers and later engineers or software developers. Sidebar: the LCD is 96x64, or 96x120 on the TI-86.

Comment Re:Keep using them as loaners (Score 1) 302

Actually, the TI-84+/SE have a USB slave port, which with some software bitbanging enterprising community hackers have turned into a host port for HID peripherals. So the USB keyboard/mouse with a calculator is a reality. Even the "dinky" TI-83 can be made to speak PS/2 with one or two KB of assembly code.

Comment Re:Your duty is clear: (Score 5, Informative) 302

CALCnet allows networking of TI-83 and similar calculators with relatively simple external hardware.

With that detail out of the way, you are free to implement a display-wall and/or the most powerful z80 cluster computer in the known universe.

Extra credit, of course, will be awarded if you succeed in writing an xorg driver that can treat an MxN array of networked calculators as a greyscale display of appropriate resolution.

As the author of that hack, I solidly second that suggestion. We also have a bunch of other calculator hacking projects that might interest you, like case-modding, adding features likes backlights, PS/2 ports, a touchpad, etc. There was the FloppyTunes project ( http://www.cemetech.net/projects/item.php?id=38 ) that lets you play music on a floppy drive with a calculator. Since you have so many calculators, though, CALCnet would be fun to play with, and since we're always looking for people to help with a wireless version of CALCnet, that might be something fun. And no one has written a distributed computation system with CALCnet yet!

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